Joint-fastener.



M. W. WINTEBMUTE.

JOINT FASTENER.

APPLICATION IYILED JUNE 9, 1909.

Patented Dec. 7, 1909.

atmnup as are a oration.

MILTON W. WINTERMUTE, or BUFFALO, NEW YORK.

JOINT-FASTENER.

Specification of Letters Patent.

, Application filed June 9, 1909. Serial No. 501,065.

To all whom it may concern:

Be it known that I, MILTON W, WINTER- MUTE, a citizen of the UnitedStates, residing at Buffalo, in the county of Erie and State of NewYork, have invented certain new and useful Improvements in Joint-Fasteners; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to joint fastenings' and has for an object toprovide means for securing together wooden or like joints by driving andwithout the employment of wedges, glue or other cementing material. v

A further object of the invention is to provide a device constructed ofresilient sheet material having stamped-up portions formed thereinadapted topermit the driving of sections of the joint together butoffering resistance to return movement of such drivenparts.

With these and other objects in view,the

.invention comprises certain novel constructions, combinations andarrangements of parts, as will be hereinafter fully described andclaimed:

In the drawings :Figure 1 is a view of the invention associated with aconventional furniture joint, it being understood, however, that the useof the invention is not limited to furniture joints. Fig. 2 is aperspective viewv of the cylindrical fastening member such as is shownin association with the chair parts of Fig. 1 and for securing a roundspindle or tenon. Fig. 3 is an embodiment of the invention adapted tosecure a fiat or rectangular tenon. Fig. 1 is a longitudinal sectionalview taken through the device as shown in Fig. 3. Fig. 5 is a transversesectional view taken through the embodiment shown at Fig. 3.

Like characters of reference designate corresponding parts throughoutthe several VleWS.

It is well-known that wood and like joints employing tenon'connectionsor the equivalents are ordinarily secured by the employment of wedges orglue, the latter being a satisfactory means for connecting 'such jointsuntil the parts become dry or until the glue is broken by sharp rappingand the like. When either of these contingencies occur the glueordinarily employed breaks away permitting the parts to separate. The

present invention embodies improved means for securing such partstogether without the employment of glue and comprises as shown at Figs.1 and 2 a cylinder 10 composed of resilient sheet metal having shortslits cut therein and the material upon each side of the slit stamped inopposite directions as shown plainly at Hand 12, the former beingsupposed to be stamped inwardly and the latter outwardly. Preferablythese stamped-up ramidal in ormation presenting more or less sharppoints 13 both within and without the cylinder. The cylindrical fastenershown at F i s. 2 and 3 are, of course, adapted for securing togetherround tenon joints as the ends 14 of legs 15 or rounds 16. To enable-therounds to be more conveniently driven one end of the cylinder ispreferably made slightly larger than the other as indicated by the slit17, so that before the fasa true cylinder but is very slightly enlargedat one end to permit the introduction of the round 14. When the end ofthe round isintroduced into the end of the cylinder the opposite end ofthe cylinder is introduced into the hole and the parts then driventogether. It will also be apparent that the 'cylinder may first beintroduced into the hole, and the tenon slightly tapered or rounded atthe end may be driven into the fastener so positioned. In the driving,the stamped-up portions 11 and 12 are forced or compressed to ward theplane of the cylinder it being understood-that the round to be driven 1sof a diameter approximately equal to the diameter of the hole less thethicknessv of the material of the fastener.

It will be apparent that when the driving has ceased the stamped-upportions 11 and 12 will spring to some extent outwardly and the points13embed themselves into the wood adjacent.- The reverse position o'ftheinclinations of the stamped-up portions 11 and '12 will prevent thewithdrawal of the parts and the forming of the tenon of a diametersubstantially equal to the diameter of the hole less the thickness ofthe material will prevent lateral movement thereof.

At Figs. 3, 4, and 5, the fastener is shown constructed substantiallyU-sha'ped as seen at 10', the stamped-up portions 11 and 12 beingsimilar in all respects to the stampedup portions shown at Fig. 2 andprovided with similar points 13. The latter form is ortions aretriangular or pyintended to he used for a flat or rectangular tenon andin operation is employed exactly as the device shown at Figs. 1 and 2 isem ployed.

What I claim is 1. A joint fastener, composed of resilient sheetmaterial having slits formed therein with the material upon oppositesides of the slits stamped in opposite directions and with oppositelydirected inclinations.

2. A joint fastener comprising sheet material and with engaging membersdisposed upon opposite sides of the sheet having adjacent engaging facesand oppositely disposed inclinations.

3. A joint fastener composed of resilient sheet material withsemipyramidal engaging portions stamped up from the sheet, thesemipyramids upon opposite sides of the sheet. having their apeXesoppositely disposed.

4:. A joint fastener composed of resilient sheet material withsemipyramidal engaging portions stamped up from the sheet, with thebases of semipyramids upon the opposite sides of the sheet adjacent andtheir apexes oppositely disposed.

.5. A joint fastener composed of resilient sheet material with similarlyformed semipyramidal engaging portions stamped up from opposite sides ofthe sheet.

6. A oint fastening composed of resilient sheet material with similarlyformed oppopyramidal engaging portions stamped up.

from opposite sides of the sheet, with the apexes of the semipyramidsupon opposite sides of the sheet oppositely directed.

8. A joint fastener composed ofresilient sheet material with similarlyformed semipyramidal engaging portions, stamped up from opposite sidesof the sheet, with the bases of the semipyramids upon opposite sides ofthe sheet adjacent and their apexes oppositely disposed.

In testimony whereof I aflix my signature in presence of two witnesses.

" .MILTON W. WVINTERMUTE.

' Witnesses:

D. J. HANLEY,

FREDERIC W. CLAUs.

